The Tears of Angels: Anderson and Costello, Book 6

A few days before the summer solstice, a 92 year old woman is found burned to death in her home. On the same day, a man's mutilated corpse is discovered, his arms ripped from their sockets, with a Tarot card depicting 'The Fool' inserted in his mouth. When the victim is identified as someone for whom the police have been looking for almost a year, detectives Anderson and Costello find themselves caught up in a case where nothing is as it seems.